This is INCREDIBLE. And is only one of many sites on the Naica Caves - do a little googling for even-more-eyepopping photos.

(When I saw the first of these photos, I thought they were clever Photoshop tricks --- but as I delved deeper I discovered these ARE very real.)

Absolutely unbelievable!!

SEE link below.

Another great site is:
http://giantcrystals.strahlen.org/america/naica.htm

Here's an even more incredible site -- wait until you read this! Amazing!! See link.

INCREDIBLE!!!Thats a find of spectacular proportions-Do EVERYTHING to preserve it!!!Geologists and mineralologists would love this.Nature can produce some things of amazing beauty and interest.